gcc vs. cc on Sun 4/330

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Article #53020

#53020

From: Douglas Scott
Date: Sat, 04 Apr 1992 21:12

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I have a sound-processing program on our Sun 4/330 (OS 4.1) that does all its  
calculations with double-precision variables.  I have been comparing its  
number-crunching speed when compiled under the native cc compiler and under gcc  
2.1, using -O for cc and "-O -f-strength-reduce" for gcc.  I was disappointed  
to find that a particular calculation took 36 seconds with the cc-compiled  
version and *58* seconds with gcc!

Am I wrong to think that I should be able to get at least equal performance out  
of gcc?  Would a different set of flags give faster results?  I would prefer to  
use gcc since our other machines do, but I dont want to sacrifice speed.

Thanks for any ideas.

--
Douglas Scott                              (805)893-8352
Center for Computer Music Research and Composition
University of California, Santa Barbara
Internet: (NeXTMail ok)   <doug@foxtrot.ccmrc.ucsb.edu>

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From: doug@foxtrot.ccmrc.ucsb.edu (Douglas Scott)
Newsgroups: gnu.gcc.help
Subject: gcc vs. cc on Sun 4/330
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Date: 4 Apr 92 21:12:22 GMT
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